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tRNA-derived fragment tRF-1001: A novel anti-angiogenic factor in pathological ocular angiogenesis.
Molecular Therapy. Nucleic Acids 2022 December 14
Transfer RNA-derived fragments (tRFs) are a novel class of non-coding RNA transcripts and play important roles in several physiological/pathological processes. However, the role of tRFs in ocular angiogenesis remains elusive. Herein, we investigate whether the intervention of tRF-1001 expression could suppress pathological ocular angiogenesis. The results show that the levels of tRF-1001 expression were reduced in the retinas of an oxygen-induced retinopathy (OIR) model, choroidal neovascularization model, and endothelial sprouting model in vitro . Increased tRF-1001 expression could suppress ocular angiogenesis and endothelial sprouting in vivo and reduce endothelial migration, specification, and sprouting in vitro . Mechanistically, tRF-1001 regulated endothelial angiogenic effects via tRF-1001/METTL3/RBPJ-MAML1 signaling. The levels of tRF-1001 expression were downregulated in the aqueous humor of age-related macular degeneration (AMD) patients. tRF-1001 upregulation could suppress AMD aqueous humor-induced endothelial sprouting and pathological angiogenesis. Collectively, tRF-1001 acts as an anti-angiogenic factor during ocular angiogenesis. Targeting tRF-1001-mediated signaling is a therapeutic option for ocular neovascular diseases.
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